CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Tantalum dust is a black odorless powder. mp: 2996 °C, bp: approx. 5250 °C. Density: 16.65 g/cm3. Insoluble in water. Tantalum oxide dust is a white, microcrystalline powder mp: 1800 °C. Density: 7.6 g/cm3. Insoluble in water. The mixture is listed as a toxic inhalation hazard by OSHA. |
|---|---|
| Color/Form | Silvery gray metal, body-centered cubic crystal structure |
| Odor | Odorless |
| Boiling Point | 9797 °F at 760 mmHg (NIOSH, 2023) |
| Melting Point | 5425 °F (NIOSH, 2023) |
| Flash Point | >250 °C |
| Solubility | Insoluble (NIOSH, 2023) |
| Density | 16.65 (metal), 14.40 (powder) (NIOSH, 2023) - Denser than water; will sink |
| Vapor Pressure | 0 mmHg (approx) (NIOSH, 2023) |
| Heat of Vaporization | 7.53X10+5 J/mol |
| Refractive Index | Index of refraction: 2.05 |
| Other Experimental Properties | Atomic number: 73; can readily be drawn in fine wires; valences: 5, also 4, 3, 2. |
| Chemical Classes | Metals -> Metals, Inorganic Compounds |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Flame Flammables GHS02  Corrosion Corrosives GHS05  Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H225:Flammable liquids H250:Pyrophoric liquids; Pyrorophoric solids H314:Skin corrosion/irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P222:Do not allow contact with air. |
COMPUTED DESCRIPTORS
| Molecular Weight | 180.9479 g/mol |
|---|---|
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 0 |
| Rotatable Bond Count | 0 |
| Exact Mass | 180.94800 g/mol |
| Monoisotopic Mass | 180.94800 g/mol |
| Topological Polar Surface Area | 0 Ų |
| Heavy Atom Count | 1 |
| Formal Charge | 0 |
| Complexity | 0 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Tantalum dust is a black odorless powder. mp: 2996 °C, bp: approx. 5250 °C. Density: 16.65 g/cm3. Insoluble in water. Tantalum oxide dust is a white, microcrystalline powder mp: 1800 °C. Density: 7.6 g/cm3. Insoluble in water. The mixture is listed as a toxic inhalation hazard by OSHA.